From the National Weather Service:
URGENT - WINTER WEATHER MESSAGE National Weather Service Taunton MA 251 PM EDT Wed Mar 21 2018 MAZ022-023-220300- /O.CAN.KBOX.WS.W.0008.000000T0000Z-180322T1200Z/ /O.EXA.KBOX.WW.Y.0018.180321T2100Z-180322T1200Z/ Barnstable MA-Dukes MA- Including the cities of Chatham, Falmouth, Provincetown, and Vineyard Haven 251 PM EDT Wed Mar 21 2018 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM EDT THURSDAY... ...WINTER STORM WARNING IS CANCELLED... * WHAT...Wet snow expected. Total wet snow accumulations of 3 to 5 inches are expected, but an inch or less on the outer Cape. * WHERE...Cape Cod and Martha`s Vineyard. * WHEN...Until 8 AM EDT Thursday. * ADDITIONAL DETAILS...Plan on slippery road conditions, including during the evening commute. Be prepared for reduced visibilities at times. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for wet snow means periods of wet snow will cause primarily travel difficulties. Be prepared for snow covered roads and limited visibilities, and use caution while driving.